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• How to create relationship between two tables with revisions using Entity Framework

  - by Chris Ridenour

  So I am in the process of redesigning a small database (and potentially a much larger one) but want to show the value of using revisions / history of the business objects. I am switching the data from Access to MSSQL 2008. I am having a lot of internal debate on what version of "revision history" to use in the design itself - and thought I had decided to add a "RevisionId" to all tables. With this design - adding a RevisionId to all tables we would like tracked - what would be the best way to create Navigational Properties and Relationships between two tables such as | Vendor | VendorContact | where a Vendor can have multiple contacts. The Contacts themselves will be under revision. Will it require custom extensions or am I over thinking this? Thanks in advance.

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• Is it possible to use HTTPS certificates for licensing?

  - by Ton van den Heuvel

  I am working on an application with multiple clients and a server running various web-services for the clients. To implement licensing I am thinking about using HTTPS as a protocol for the web-services using certificates that are issued by our company. By influencing the expiration date of a certificate for a client we can prevent them from using our software after their license term. It this possible and does it make sense to you? Additional information: I am planning on using Qt/C++ for the clients, and the Twisted framework for the web-services.

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• Element Positioning affected by Browser Screen Resolution Change

  - by Ed

  Hello, newbie developer here. There's this small problem I always encounter. Every time I try to change browser resolution (or what do you call the event when you scroll the mouse wheel while pressing ctrl), some elements (Mostly form elements) get to be shifted down or somewhere else, which does not conform with the original positioning. Im not sure if the problem is with the CSS or the markup itself and Im not really sure if this is much of a problem. Should I ignore it? (It doesn't feel very comfortable though, thinking that it might become problematic in the near future) Otherwise, any solution on how to avoid this? Simple explanations are very much appreciated, Thanks. (Perhaps the used term newbie should be replaced with noob?. Haha.)

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• What are the steps for making domain-neutral assemblies?

  - by Mystagogue

  ...and can those steps also be applied to a 3rd party assembly (that might already be strong-named)? The context for my question should not be important, but I'll share anyway: I'm thinking of making a logger (or log-wrapper) that always knows what "log source" to target, regardless of whether the assemblies using it are in one appdomain, or spread across several appdomains. I think one way to achieve that, is to have a domain-neutral assembly with a static "LogSource" property. If that static property is set in a domain-neutral assembly, I think all appdomains will see it.

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• Dummy SMTP Server for testing apps that send email

  - by Patrick McElhaney

  I have a lot of apps that send email. Sometimes it's one or two messages at a time. Sometimes it's thousands of messages. In development, I usually test by substituting my own address for any recipient addresses. I'm sure that's what everybody else does, until they get fed up with it and find a better solution. I was thinking about creating a dummy SMTP server that just catches the messages and dumps them in a SQLLite database, or an mbox file, or whatever. But surely such a tool already exists? How do you test sending email?

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• How to generate tests with different names in testng, java?

  - by Ula Karzelek

  I'm using testng to run selenium based tests in java. I have a bunch of repeated tests. Generally they do all the same except of test name and one parameter. I want to automate generation of it. I was thinking about using factory. Is there a way to generate tests with different name? What would be the best approach to this? As for now I have something like below and I want to create 10 tests like LinkOfInterestIsActiveAfterClick @Test(dependsOnGroups="loggedin") public class SmokeTest extends BrowserStartingStoping{ public void LinkOfInterestIsActiveAfterClick(){ String link = "link_of_interest"; browser.click("*",link); Assert.assertTrue(browser.isLinkActive(link)); } } My xml suite is auto-generated from java code. test names are crucial for logging which link is active, and which one is not.

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• Bitwise operators versus .NET abstractions for bit manipulation in C# prespective

  - by Leron

  I'm trying to get basic skills in working with bits using C#.NET. I posted an example yesterday with a simple problem that needs bit manipulation which led me to the fact that there are two main approaches - using bitwise operators or using .NET abstractions such as BitArray (Please let me know if there are more build-in tools for working with bits other than BitArray in .NET and how to find more info for them if there are?). I understand that bitwise operators work faster but using BitArray is something much more easier for me, but one thing I really try to avoid is learning bad practices. Even though my personal preferences are for the .NET abstraction(s) I want to know which i actually better to learn and use in a real program. Thinking about it I'm tempted to think that .NET abstractions are not that bad at, after all there must be reason to be there and maybe being a beginner it's more natural to learn the abstraction and later on improve my skills with low level operations, but this is just random thoughts.

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• Open Source CMS with linked sub-sections and users

  - by Teegijee

  I work at a small college that wants to make "sites" for all of the academic departments (~30). I managed to talk them out of their original idea: 30 individual Wordpress installations. What a maintenance nightmare! What I'm looking for is a CMS (preferably Python or PHP, as those are my areas of expertise) that can automagically create a subsection (or subsite, whatever the appropriate vernacular) complete with user and a couple of headings based on a template. So, I could just click a button and have a new subsection for a new department complete with its own authorized user, and default subsection headings/menu/pages. Is this just wishful thinking? I don't mind getting my hands dirty (this would be the whole of my job duties), so what platform would be a good starting point for something like this? Open source is a must for me as I have literally no budget, and I'm probably going to have to dig pretty deep into the application.

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• Are there any open-source / free site analytics solutions that are intranet deployable?

  - by Richard Nichols

  There are plenty of statistics/analytics providers for Internet deployed software (e.g. Google Analytics), but I'm looking for an analytics tool to integrate into a LAN/intranet based web application. I'm aware of AWStats, but I'd prefer something with a design similar to Google Analytics, where a Javascript callback can be embedded into the app and call back to an analytics server. This doesn't require any sort of extra application server configuration and access to run. I'm thinking there's nothing available that isn't proprietary / pay-for, but I'd love to be told I'm wrong!

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• Strategies for generating Zend Cache Keys

  - by emeraldjava

  ATM i'm manually generating a cache key based on the method name and parameters, then follow to the normal cache pattern. This is all done in the Controller and i'm calling a model class that 'extends Zend_Db_Table_Abstract'. public function indexAction() { $cache = Zend_Registry::get('cache'); $individualleaguekey = sprintf("getIndividualLeague_%d_%s",$leagueid,$division->code); if(!$leaguetable = $cache->load($individualleaguekey)) { $table = new Model_DbTable_Raceresult(); $leaguetable = $table->getIndividualLeague($leagueid,$division,$races); $cache->save($leaguetable, $individualleaguekey); } $this->view->leaguetable = $leaguetable; .... I want to avoid the duplication of parameters to the cache creation method and also to the model method, so i'm thinking of moving the caching logic away from my controller class and into model class packaged in './model/DbTable', but this seems incorrect since the DB model should only handle SQL operations. Any suggestions on how i can implement a clean patterned solution?

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• Programmatically Download Image to Desktop from Remote App with Ruby?

  - by viatropos

  I was thinking about making a little crop/resize batch processor online, and wanted to know if there was a way for me to do the following: upload image and specify dimensions click "process" and app resizes image image downloads automatically to wherever it was I uploaded it (say from my desktop), but with a new name (based on the time for example). This would make it so I could host a free image processor that never stored any data other than tempfiles. Is that possible? Something like Rails' send_file method, but I'm using Sinatra and am looking for something in pure ruby.

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• JavaScript data grid for millions of rows

  - by Rudiger

  I need to present millions of rows of data to users in a grid using JavaScript. I don't want the user thinking about viewing finite pieces of data; it should appear that all of the data is available. Rather than downloading all the data at once, small chunks are downloaded as the user comes to them (by scrolling, keying in row numbers, searching). The rows will not be edited through this front end, so read-only answers are acceptable. What JavaScript data grids are best for this kind of seamless paging?

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• Http Geocoder (Google) Accuracy level

  - by sushruth

  I am geocoding a large amount of user entered addresses and interested in the accuracy levels returned. My GOAL is to get the BEST POSSIBLE ACCURACY score for a given address. I call the geocder api following way http://maps.google.com/maps/geo?q={address}&output=csv&sensor=false&key=xx now the accuracy levels returned for same address with/without premise name q = Key Arena, 305 Harrison Street, Seattle, WA 98109 (Accuracy is 5) q = 305 Harrison Street Seattle, WA 98109 (Accuracy is 8) q = Key Arena, Seattle, WA 98109 (Accuracy is 9.) Its obvious from the above that the google servers does not return the best accuracy when street name is appended with premise/venue. the question is :) is there a way to pass the complete address ( with premise name / i.e case 1 ) and get the Max Accuracy. ( or how can tell the google server that the address is passed with premise/building name and street name) ( if you are thinking why not just use case 3, the answer is these are user entered addresses, they could enter "my moms's house" for premise, with accurate street address. in which case i want the accuracy to be 8 not 5)

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• command line tool text output

  - by Martin

  I have a small command line tool and after running it, I'd like to display the text output in a way that's easy for someone to copy/paste and save it or email it to someone else. Copy/pasting from a command prompt is not done in the standard way, so I don't want people to have to copy/paste from there. Saving the file to disk is possible, but the folder where the tool is located may not have access rights so the user would have to configure the output file location (this may be too tricky for some users). I was thinking of launching notepad with some text in it, generated from the command line tool. Is this possible? Any other suggestions?

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• Would you use Code Bubbles?

  - by Paulo Santos

  I've read this question mentioning Code Bubbles and I've watched their video presentation. The video is impressive, and does seem a little bit futuristic, but apparently it's somewhat real. But that kept me thinking... Would a developer really use such tool? We, as developers, are used to deal with code files, organizing them in directories, in one way or another, some common IDE (for those language that has them). It would be a great leap to use something like Code Bubbles, as they propose. I, personally, am not sure if I could work in such environment... although I think I would just need some adjusting... but I really don't see my mind working out the kinks of it. What are your thoughts on this?

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• Google App Engine Database Index

  - by fjsj

  I need to store a undirected graph in a Google App Engine database. For optimization purposes, I am thinking to use database indexes. Using Google App Engine, is there any way to define the columns of a database table to create its index? I will need some optimization, since my app uses this stored undirected graph on a content-based filtering for item recommendation. Also, the recommender algorithm updates the weights of some graph's edges. If it is not possible to use database indexes, please suggest another method to reduce query time for the graph table. I believe my algorithm does more data retrieval operations from graph table than write operations. PS: I am using Python.

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• implement string class with custom behavior

  - by truman

  In one of our class sir said that template allows one to customize behavior of class, and then he gave example of string class, that with few lines of code we can customize string class from STL, as in, we can make it to treat 'a' and 'z' same, 'b' and 'y' same, 'c' and 'x' same and so on. Similary 'A' and 'Z' same etc. "abc" == "zyx" is true; "Abc" == "zyx" is false; "Abc == "Zyx" is true; etc I was thinking of implementing such string class, but I am not able to do so. How can we implement such string class using templates?

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• Secure database connection. DAL .net architecture best practice

  - by Andrew Florko

  We have several applications that are installed in several departments that interact with database via Intranet. Users tend to use weak passwords or store login/password written on a shits of paper where everybody can see them. I'm worried about login/password leakage & want to minimize consequences. Minimizing database-server attack surface by hiding database-server from Intranet access would be a great idea also. I'm thinking about intermediary data access service method-based security. It seems more flexible than table-based or connection-based database-server one. This approach also allows to hide database-server from public Intranet. What kind of .net technologies and best practices would you suggest? Thank in you in advance!

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• How do you reach a "flow" state while programming?

  - by acrosman

  I'm not talking about program flow, but as in the state of working called flow, the state where you can get great work done the most effectively. I find that my current work environment while good in many ways does not allow me to get into a good state of mind for writing code most of the time (my job includes many other functions). If it's critical to get something done I'll often put on head-phones with classical music and try to drown out the office noise around me (and discourage co-workings from asking me questions). I am best able to get work done late in the evening when the house is quite and I've been thinking about the project for most of the day. What tricks have you found when working in less then perfect office environments?

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• Why prefix sql function names?

  - by AaronLS

  What is a scenario that exemplifies a good reason to use prefixes, such as fn_GetName, on function names in SQL Server? It would seem that it would be unnecessary since usually the context of its usage would make it clear that it's a function. I have not used any other language that has ever needed prefixes on functions, and I can't think of a good scenario that would show why SQL is any different. My only thinking is that perhaps in older IDE's it was useful for grouping functions together when the database objects were all listed together, but modern IDE's already make it clear what is a function.

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• Perl : how to interrupt/resume loop by user hitting a key?

  - by Michael Mao

  Hi all: This is for debugging purpose. I've got a for loop that generates some output to Cygwin bash's CLI. I know that I can redirect outputs to text files and use Perl or even just a normal text editor to inspect the values printed out for a particular iteration, just feel that a bit painful. What I am now thinking is, to place a special subroutine inside the for loop, so that it would be "interrupted" at the beginning of each iteration, and Perl script should only resume to run after user/programmer hits a key(the Enter Key from keyboard?) In this way I can directly inspect the values printed out during each iteration. Is there a simple way to do this, without using additional libraries/CPAN ? Many thanks to the hints/suggestions in advance.

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• Does Python work in larger teams?

  - by Kugel

  I read this post last night and it got me thinking. I like python and "batteries", pypi and such. But I've only done python solo. Never tried it in a team. Are the points that Ted mentions valid? If they are how do teams cope with them? Does Python work in teams or even large teams? Or it kills productivity? I personally see the problems he mentions when I come back to my old code. Even when working with other modules sometimes I need to peek inside. I would like to hear people with experience on this.

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• What is recursion? -- In plain english.

  - by Christopher Altman

  I hear this word everyday, but cannot give a meaningful, concise, or plain-english answer to what it is. Recursion is defined by the bastian of knowledge as: Recursion in computer science is a method where the solution to a problem depends on solutions to smaller instances of the same problem.1 The approach can be applied to many types of problems, and is one of the central ideas of computer science.[2] Source Is recursion simply something that repeats itself to get a solution? I am looking for a "Recursion for Dummies" definition, and maybe simple examples. My goal is to be able to understand and explain recursion in my own words. I do not like simply thinking I know the meaning of something because I hear it referenced daily, but have not paused to form my own understanding.

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• is there a tool to see the difference between two database tables in SQL Server?

  - by reinier

  What is a good tool to see the differences between 2 tables (or even better, the datasets returned by 2 queries). EDIT: I'm not interested in the schema changes. Just assume that the schemas are the same. background as to why: I'm porting some legacy code which can fill a database with some pre-calced data. The easiest way to see if I got everything right, is to check the output of the old program, with the new one. I was thinking that if there is some kind of 'diff' tool for databases, this might be great.

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• What are the advantages of a distributed version control for a team that is effectively never distri

  - by Luke CK

  When working remotely, our team only has access to our source code by remote desktop into our office PCs so we never really work in offline mode. Does a distributed version control system like Mercurial or Git still give us advantages over our current centralized Subversion set up? If so, what are they? Are there any drawbacks or pitfalls? I've read in numerous places that shifting to distributed version control requires a change in thinking. Can someone explain what needs to change in this regard?

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